Click on the "Fetch New Scrape Information" as FB is most likely caching these pages.

I just tried this and it works fine, http://screencast.com/t/EItCEy5BbpmM

Mark, that post worked as per my original post to you:

Shared another post just before and it was fine. See: https://www.opgroeigids.nl/community/stream/item/3829

The other one does not, hence the issue. I already tried "Fetch New Scrape Information".
Post with Issue: https://www.opgroeigids.nl/community/stream/item/3830

This was the last post which correctly used the image when shared to Facebook (see attached). After which we now only see our logo appear instead of the image. And when testing with Facebook Debugger we get the following error:

Object at URL 'https://www.opgroeigids.nl/community/stream/item/3833' of type 'article' is invalid because the given value '//http://www.opgroeigids.nl/OG_witteachtergrond_vierkant.gif' for property 'og:image:url' could not be parsed as type 'url'.

Would really appreciate help in getting this resolved as soon as possible as we are unable to share our stream items now on Facebook.

The link https://www.opgroeigids.nl/community/stream/item/3830 works fine too as I don't see any errors.

I removed the og:image meta from the index file and then it worked.

Hm, which index file? EasySocial's?

Mark, the one we have in template's index.php. So now we are having issues when sharing the site to social media.

<!-- <meta property="og:image" content="//http://www.opgroeigids.nl/OG_witteachtergrond_vierkant.gif"/> -->

It was working fine all the time until Friday. The morning's post worked perfectly and then the issue started.

How can we resolve this?

I have no idea what the issue is all about here but you definitely shouldn't hardcode these items on the template's index.php file